Patent US2833768A successfully refreshed from Google Patents.
US2833768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compounds with vitamin brlike activity
Assignee: —
•
Filing: —
•
Granted: 1958-05-06
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Expires: 1975-05-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:46
CPC Classifications
C; C07; C07D; C07D415/00; C07D401/00; C07D401/02; C07D401/12; C07D401/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A MEMBER SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS WHICH CORRESPOND TO THE FORMULA
Claim 2
Dependent Claim
14 words
A MEMBER SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS WHICH CORRESPOND TO THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |